Means to supply heated air to carbureters.



V. P. ALEXANUth.

MEANS T0 SUPPLY HEATED AIR TO CARBURETERS.

APPLICATION FILED SEPT. 2;. me.

1Q26,00. Patentediwm ze wls.

' My'gz wwzdw v VERNE 1?, ALEZFL'AZQ'DER, OF CHICAGO, ILLINOIS,AEiSIG-NOR TO WILLIAM G. WILIVIOT, OF

' CHICAGO, ILHIQUIS.

MEANS '10 SUPPLY .I-IEA'EEI) A13; TU CBURETERS" Specification of LettersPatent.

Patented May an the,

Application filed September 21, 191a Serial No. 128L363.

- of the invention are to impart to the simler and less ex ensive formsof carburetors P l .a higher efiiciencyand greater economy of fuel; toprovide this insuch'a simple and comparatively inexpensive form that theimprovement is operable by a comparatively unskilled user; to provide myimprovement I in a part or section of. the, standardized mechanism whichis not only simply, buteasily accessible;and-removable by one notskilled in this particular art, and to avoid any change ofparts,;reconstruction, or alteration of standardized parts beyond themere substitution of a partembodying my improvementfor one apparentlysubstantially similar that is removed from exlsting and well knownconstruction.

With the above objects in view my invention consists-in the novelcarbureter attachment, its construction, arrangement and combination ofparts, hereinafter described in detail, illustrated in the accompanyingdrawing and particularly pointed out in the appended claims.

In the--drawing- Figural is a side elevation of an auto mobile engine ofa universally known construction, its carbureter and the air andexplosive mixture pipes leading thereinto an therefrom to the enginecylinders.

' "-Fig. 2 is a, vertical section through a well known and, perhaps,most commonly used form of simple carbureter and itsinlet, or

hot air, pipe constructed and equipped in accordance with my invention,together witha short broken away section of the carbureter outlet ormanifold pipe.

Fig. 3 is a section taken substantially on the l1ne'X-X of Fig. 2. Fig.{l is a section taken on the line Y Y of Fig. 2.

. In the several views 2 represents the inlet hub or branch and 3 theoutlet hub or branch of the carburetor, the generahdetails of passage 6.that is, like 4 the top and. has an 1, in the conventional manner to thewell known engine thereinshown. The body of the inlet, or hot airpipe5attached to the carburetor branch 2 is, as shown, ort' the usualand Well'known-form. To this body, which I make, preferably, of alumi-.

num I cast an auxiliary conduit, bypass, or the conduit 5, open atoutlet end 7, which is always open to the carbureters interior. In theusually likewise free and always open conduit 5 I interpose in the elbowbend of ranged in a circle as shown in Fig. 3. These openings arecontrolled by meansof a disk or puppet valve 10 that is normally heldclosed'by a spiral compression spring 11 which isarranged to bearagainst the disk or valve 10 and against a head 12 on a bolt -its outletend a wall 8 with openings 9 aror stem 13 on which the valve 10 isslidable i and which is provided with a threadedend 14 that isscrew-threaded into a recessed and threaded hub 15 in the center of thewall 8. As shown the air capacity of the passage 6 is less than that ofthe usual pipe 5. daid passage 6 is proportioned to take care ofthe lowspeed or engine starting air requirements and to .be aided by a flowofair thlQliligll the usual pipe 5 when the suction 1 1s su enginethrough the admission thereto of moreg as, to cause the valve 10 toovercome the reslstance of the spring 11. The extent ciently increased,by speeding up the of opening movement of the valve 10 will beautomatically proportioned by said resistance spring to the carburizingrequirements, which provides a uniformity of mixture, or avoids anexcess of air through the inlet pipe 5 and the corresponding waste offuel oil that must be made to correspond with such excess in order toproduce a mix ture of ail: and gasolene, or other liquid vapor that maybe exploded by the engine spark.

By placing the control valve 10 in the inlet pipe 5, or hot. air pipe,which in these types of engines is'always a readilv removable section, Iavoid the complexities in the carbureter itself Which enhance verymaterially the prices of the more expensive carbureters which aredesigned to efiebt the higher etiiciencies, automatieair regulation,

'of' the carbureter, together with the admission of the controlled flowof air in the form of a series of spaced apart jets issuing through theholes or perforations 9, also tends to better atomize, divide, orprepare the admitted air for a thorough mixing with the oil vaporadmitted into the carbureter.

The length. of the hot air pipe 5'will de- )(Jld upon the relativevpositions of the carbureter and the exhaustpipe 16, th-lip 17 at theinletend of the hot airpipe being so positioned as to cause all the airentering the carbureter .to first pass around this exhaust pipe and beheated therebyfl Having thus described my invention, I

. claimvas new and desire to secure by Letters Patent ,1. Thecombination with a carbureter ofan internal combustion engine, of an airsupply device attached thereto and provided with two passages, one ofwhich isuninterrupted, a valve mounted in th other passage, theintakeends of said passages being from its seat by l adjacent theexhaust pipe of the engine so 40 that the air drawn into the passage maybeheated, and a spring mounted in engageing to the exhaust pipe of theengine and provided with two passages, one of which is uninterrupted, avalve mounted m the other passage, and a sprlng mounted in engage- "mentwith the valve to hold said second passage closed until the valve ismoved from u its seat by the force of the suction of the engine, theinlet end of the air su ply device being so positioned relative to t eexhaust pipe of the engine that the air passing to the carbureter willbe heated by sald exhaust 1 e. p The combination with a carbureter of aninternal combustion engine provided with a manually operable intakevalve and the exhaust pipe of said engine, of a normally closed passageextending from said exhaust pipe to said carbureter, and a spring heldvalve in said passage adapted to be moved the-suction of the engine andof an 0 en passage alongside the normally close passage and alsoextending from. the exhaust pipe to the carbureter to constantly conductheated air thereto while the engine is running.

In testimony whereof I have hereunto signed my name.

VERNE P. ALEXANDER.

